Leaf Photosynthesis Characteristics of Seven Japanese Strawberry Cultivars Grown in a Greenhouse

Twelve strawberry cultivars established in matted row plots in 1993 were treated with insecticides for tarnished plant bug or left untreated for the 1994, 1995, and 1996 seasons. `Honeoye', `Cavendish', and `Oka' had the highest yields of marketable fruit. `Jewel', `Chambly', and `Kent' had lower, but acceptable, yields. `Lateglow', `Blomidon', `Seneca, NY1424', `Settler', and `Governor Simcoe' had lower yields than other varieties. Tarnished plant bug populations were very low during the 1994 and 1996 seasons, and thus feeding pressure may have been too low for any differences in susceptibility between varieties to be expressed. In 1995, when tarnished plant bug feeding pressure was greatest, `Oka', `Cavendish', and `Honeoye' had the lowest injury levels. `Kent' and `Lateglow' had the highest levels of injury. Insecticide sprays significantly reduced the percent of injured fruit for most cultivars, but did not significantly increase the weight of marketable fruit harvested. This is due to injury being most prevalent on lower order, and thus smaller, fruit. Cultivars that produced high yields, had low injury levels, and had the least difference between sprayed and unsprayed treatments are most likely to have resistance to tarnished plant bug injury. `Oka', `Cavendish', and `Honeoye' were the most promising cultivars in this regard.

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Scaling leaf photosynthesis to canopy in a mixed deciduous forest. I. model description

Silva Gandavensis ◽

10.21825/sg.v62i0.842 ◽

1997 ◽

Vol 62 ◽

Author(s):

R. Samson ◽

S. Follens ◽

R. Lemeur

Keyword(s):

Temperature Dependence ◽

Quercus Robur ◽

Deciduous Forest ◽

Growing Season ◽

Model Description ◽

Canopy Photosynthesis ◽

Leaf Photosynthesis ◽

Layer Model ◽

Mixed Deciduous Forest ◽

Leaf Level

A multi-layer model (FORUG) was developed, to simulate the canopy photosynthesis of a mixed deciduous forest during the growing season. Measured photosynthesis parameters, for beech (Fagus sylvatica), oak (Quercus robur) and ash (Fraxinus excelsior), were used as input to the model. This information at the leaf level is then scaled up to the level of the canopy, taking into account the radiation profiles (diffuse and direct PAR) in the canopy, the vertical LAI distribution, the evolution of the LAI and the photosynthesis parameters during the growing season, and the temperature dependence of the latter parameters.

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Cultivation Conditions Change Aroma Volatiles of Strawberry Fruit

Horticulturae ◽

10.3390/horticulturae7040081 ◽

2021 ◽

Vol 7 (4) ◽

pp. 81

Author(s):

Yunduan Li ◽

Yuanyuan Zhang ◽

Xincheng Liu ◽

Yuwei Xiao ◽

Zuying Zhang ◽

...

Keyword(s):

Volatile Compounds ◽

Major Contributor ◽

Fragaria Ananassa ◽

Strawberry Fruit ◽

Cultivation Conditions ◽

Soil Culture ◽

Aroma Volatiles ◽

Ms Analysis ◽

Significant Difference ◽

Strawberry Cultivars

Volatile compounds principally contribute to flavor of strawberry (Fragaria × ananassa) fruit. Besides to genetics, cultivation conditions play an important role in fruit volatile formation. Compared to soil culture as control, effects of substrate culture on volatile compounds of two strawberry cultivars (‘Amaou’ and ‘Yuexin’) were investigated. GC-MS analysis revealed significant difference in volatile contents of ‘Amaou’ strawberry caused by substrate culture. No significant effect was observed for cultivar ‘Yuexin’. For ‘Amaou’ strawberry from soil culture produced higher volatile contents compared with substrate culture. This difference is contributed by high contents of esters, lactones, ketones, aldehydes, terpenes, hydrocarbons, acids, furans and phenols in ‘Amaou’ strawberry fruit from soil culture. Furanones, beta-linalool, trans-Nerolidol and esters are major contributor to strawberry aroma, whose contents are higher in soil culture planted fruit when compared to substrate culture. Moreover, strawberry fruit from soil culture had higher transcripts related to volatile biosynthesis were observed, including FaQR, FaOMT, FaNES1, FaSAAT and FaAAT2.

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Yield and Fruit Quality of Strawberry Cultivars under Different Irrigation Regimes

Agronomy ◽

10.3390/agronomy11020261 ◽

2021 ◽

Vol 11 (2) ◽

pp. 261

Author(s):

María Teresa Ariza ◽

Luis Miranda ◽

José Antonio Gómez-Mora ◽

Juan Jesús Medina ◽

David Lozano ◽

...

Keyword(s):

Fruit Quality ◽

Environmental Sustainability ◽

Water Productivity ◽

Production Cycle ◽

High Productivity ◽

Yield Efficiency ◽

Significant Yield ◽

Water Treatments ◽

Strawberry Cultivars

Strawberry (Fragaria×ananassa Duch.) production requires the input of large amounts of water provided by irrigation during the entire production cycle. However, water availability is shrinking in many important strawberry cropping areas, such as Huelva (in Europe), compromising the environmental sustainability and economic viability of strawberry production. Besides technical approaches, water-saving strategies are necessary for improving strawberry water productivity such as the use of low water-consumptive cultivars with high productivity or cultivars allowing deficit irrigation (DI) strategies. A two-year field experiment was conducted to compare the physiological and agronomical response of six commercial strawberry cultivars (‘Sabrina’, ‘Fortuna’, ‘Splendor’, ‘Primoris’, ‘Rabida’ and ‘Rociera’) to six different water treatments ranging from 65% to 140% of estimated ‘Sabrina’ evapotranspiration (ETcSab; ~224–510 mm year−1). Cultivars differed substantially in yield and water consumption linked to their biomass partitioning into reproductive/ vegetative organs, determining different yield efficiency (YE). Their water needs (IN) conditioned their response to different water supplies, involving significant yield losses in DI treatments (<20% IN) but not decreasing fruit quality. The highly-consumptive and productive ‘Rabida’ and ‘Rociera’, reduced yields by DI (<40%) but were still profitable; the low-water-consumptive but still productive ‘Fortuna’, ‘Splendor’ and ‘Primoris’ represent significant water-savings (<20%) in strawberry cultivation.

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Leaf Photosynthesis and Senescence in Heated and Droughted Field-grown Soybean with Contrasting Seed Protein Concentration

Plant Physiology and Biochemistry ◽

10.1016/j.plaphy.2021.06.008 ◽

2021 ◽

Author(s):

Verónica V. Ergo ◽

Rodolfo E. Veas ◽

Claudia R.C. Vega ◽

Ramiro Lascano ◽

Constanza S. Carrera

Keyword(s):

Protein Concentration ◽

Seed Protein ◽

Leaf Photosynthesis ◽

Seed Protein Concentration

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Transplant season influences the horticultural potential of strawberry cultivars in Brazil

The Journal of Horticultural Science and Biotechnology ◽

10.1080/14620316.2021.1938704 ◽

2021 ◽

pp. 1-7

Author(s):

Nicolas dos Santos Trentin ◽

Rosiani Castoldi da Costa ◽

José Luís Trevizan Chiomento ◽

Thomas dos Santos Trentin ◽

Fabiola Stockmans De Nardi ◽

...

Keyword(s):

Strawberry Cultivars

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Overexpressing the HD-Zip class II transcription factor EcHB1 from Eucalyptus camaldulensis increased the leaf photosynthesis and drought tolerance of Eucalyptus

Scientific Reports ◽

10.1038/s41598-019-50610-5 ◽

2019 ◽

Vol 9 (1) ◽

Cited By ~ 2

Author(s):

Keisuke Sasaki ◽

Yuuki Ida ◽

Sakihito Kitajima ◽

Tetsu Kawazu ◽

Takashi Hibino ◽

...

Keyword(s):

Transcription Factor ◽

Leaf Area ◽

Leucine Zipper ◽

Eucalyptus Grandis ◽

Eucalyptus Camaldulensis ◽

Class Ii ◽

Cell Multiplication ◽

Leaf Photosynthesis ◽

Unit Leaf

Abstract Alteration in the leaf mesophyll anatomy by genetic modification is potentially a promising tool for improving the physiological functions of trees by improving leaf photosynthesis. Homeodomain leucine zipper (HD-Zip) transcription factors are candidates for anatomical alterations of leaves through modification of cell multiplication, differentiation, and expansion. Full-length cDNA encoding a Eucalyptus camaldulensis HD-Zip class II transcription factor (EcHB1) was over-expressed in vivo in the hybrid Eucalyptus GUT5 generated from Eucalyptus grandis and Eucalyptus urophylla. Overexpression of EcHB1 induced significant modification in the mesophyll anatomy of Eucalyptus with enhancements in the number of cells and chloroplasts on a leaf-area basis. The leaf-area-based photosynthesis of Eucalyptus was improved in the EcHB1-overexpression lines, which was due to both enhanced CO2 diffusion into chloroplasts and increased photosynthetic biochemical functions through increased number of chloroplasts per unit leaf area. Additionally, overexpression of EcHB1 suppressed defoliation and thus improved the growth of Eucalyptus trees under drought stress, which was a result of reduced water loss from trees due to the reduction in leaf area with no changes in stomatal morphology. These results gave us new insights into the role of the HD-Zip II gene.

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